package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {

    //微信服务接口地址
    public static final String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatProperties weChatProperties;


    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        log.info("微信登录中...");
        //调用微信接口服务获取openid
        String code=userLoginDTO.getCode();
        String openId = getOpenId(code);
        //判断id是否为空
        if(openId==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断是否为新用户
        User user = userMapper.getByOpenid(openId);
        if(user == null){
            user = User.builder()
                    .openid(openId)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        //返回user对象
        return user;
    }

    private String getOpenId(String code){
        Map<String, String> map=new HashMap<>();
        map.put("appid", weChatProperties.getAppid() );
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);

        JSONObject jsonObject = JSON.parseObject(json);
        String openId = jsonObject.getString("openid");
        return openId;
    }
}
